import { Client, EmbedBuilder, TextChannel } from 'discord.js';
import { getGasPricesInGwei } from './blockchain';
import redisClient from './redis';

import { GasAlert } from '../types/gasAlert';

const createGasPriceChecker = (client: Client) => {
  setInterval(async () => {
    try {
      const gasPrices = await getGasPricesInGwei();
      
      const gasAlerts: GasAlert[] = await redisClient
        .get('gas-alerts')
        .then((value) => (value ? JSON.parse(value) : []));

      gasAlerts.forEach(async (gasAlert) => {
        if (gasPrices.fast <= gasAlert.threshold) {
          const channel = await client.channels.fetch(gasAlert.channelId) as TextChannel;
          const user = await client.users.fetch(gasAlert.userId);

          channel.send({
            embeds: [
              new EmbedBuilder()
                .setTitle('Gas price alert!')
                .setDescription(`<@${gasAlert.userId}>!\n\nThe current gas prices have fallen below your alert threshold of ${gasAlert.threshold} Gwei. The current gas prices are: \n\n Fast: ${gasPrices.fast} Gwei \n\n Average: ${gasPrices.average} Gwei \n\n Slow: ${gasPrices.slow} Gwei`)
                .setColor('#FF8C00')
            ],
            target: user
          })
        }
      });
    } catch (error) {
      console.error(`Error checking gas prices: ${error}`);
    }
  }, 15000);
};

export { createGasPriceChecker };